'FLASK_APP' is not recognized as an internal or external command, operable program or batch file. code example

Example 1: 'flask' is not recognized as an internal or external command, operable program or batch file.

set PATH=C:\Users\YOUR_USER_NAME\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\Scripts

Example 2: run flask app from command line

# For bash do this:
set FLASK_APP=<app_name>

# For powershell do this:
$env FLASK_APP=<app_name>

# Run it like this
flask run

Example 3: flask commands

# manage.py

from flask_script import Manager

from myapp import app

manager = Manager(app)

@manager.command
def hello():
    print "hello"

if __name__ == "__main__":
    manager.run()